diff --git a/manimlib/animation/transform_matching_parts.py b/manimlib/animation/transform_matching_parts.py
index f92d962d..2b452d2d 100644
--- a/manimlib/animation/transform_matching_parts.py
+++ b/manimlib/animation/transform_matching_parts.py
@@ -12,7 +12,7 @@ from manimlib.animation.transform import ReplacementTransform
 from manimlib.animation.transform import Transform
 from manimlib.mobject.mobject import Mobject
 from manimlib.mobject.mobject import Group
-from manimlib.mobject.svg.mtex_mobject import LabelledString
+from manimlib.mobject.svg.labelled_string import LabelledString
 from manimlib.mobject.types.vectorized_mobject import VGroup
 from manimlib.mobject.types.vectorized_mobject import VMobject
 from manimlib.utils.config_ops import digest_config
diff --git a/manimlib/mobject/svg/labelled_string.py b/manimlib/mobject/svg/labelled_string.py
new file mode 100644
index 00000000..55909dc6
--- /dev/null
+++ b/manimlib/mobject/svg/labelled_string.py
@@ -0,0 +1,843 @@
+from __future__ import annotations
+
+import re
+import colour
+import itertools as it
+#from types import MethodType
+from typing import Iterable, Union, Sequence
+from abc import abstractmethod
+
+from manimlib.constants import WHITE
+from manimlib.mobject.svg.svg_mobject import SVGMobject
+from manimlib.mobject.types.vectorized_mobject import VGroup
+from manimlib.utils.color import color_to_int_rgb
+from manimlib.utils.config_ops import digest_config
+from manimlib.utils.iterables import adjacent_pairs
+from manimlib.utils.iterables import remove_list_redundancies
+from manimlib.utils.tex_file_writing import tex_to_svg_file
+from manimlib.utils.tex_file_writing import get_tex_config
+from manimlib.utils.tex_file_writing import display_during_execution
+from manimlib.logger import log
+
+
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from manimlib.mobject.types.vectorized_mobject import VMobject
+    ManimColor = Union[str, colour.Color, Sequence[float]]
+    Span = tuple[int, int]
+
+
+SCALE_FACTOR_PER_FONT_POINT = 0.001
+
+
+class _StringSVG(SVGMobject):
+    CONFIG = {
+        "height": None,
+        "stroke_width": 0,
+        "stroke_color": WHITE,
+        "path_string_config": {
+            "should_subdivide_sharp_curves": True,
+            "should_remove_null_curves": True,
+        },
+    }
+
+
+class LabelledString(_StringSVG):
+    """
+    An abstract base class for `MTex` and `MarkupText`
+    """
+    CONFIG = {
+        "base_color": WHITE,
+        "use_plain_file": False,
+        "isolate": [],
+    }
+
+    def __init__(self, string: str, **kwargs):
+        self.string = string
+        digest_config(self, kwargs)
+        self.pre_parse()
+        self.parse()
+        super().__init__(**kwargs)
+
+    def get_file_path(self, use_plain_file: bool = False) -> str:
+        content = self.get_decorated_string(use_plain_file=use_plain_file)
+        return self.get_file_path_by_content(content)
+
+    @abstractmethod
+    def get_file_path_by_content(self, content: str) -> str:
+        return ""
+
+    def generate_mobject(self) -> None:
+        super().generate_mobject()
+
+        submob_labels = [
+            self.color_to_label(submob.get_fill_color())
+            for submob in self.submobjects
+        ]
+        if self.use_plain_file or self.has_predefined_colors:
+            file_path = self.get_file_path(use_plain_file=True)
+            plain_svg = _StringSVG(file_path)
+            self.set_submobjects(plain_svg.submobjects)
+        else:
+            self.set_fill(self.base_color)
+        for submob, label in zip(self.submobjects, submob_labels):
+            submob.label = label
+        self.submob_labels = submob_labels
+        self.post_parse()
+
+    def pre_parse(self) -> None:
+        self.full_span = self.get_full_span()
+        self.space_spans = self.get_space_spans()
+
+    def parse(self) -> None:
+        self.command_repl_items = self.get_command_repl_items()
+        self.command_spans = self.get_command_spans()
+        self.ignored_indices = self.get_ignored_indices()
+        self.skipped_spans = self.get_skipped_spans()
+        self.internal_specified_spans = self.get_internal_specified_spans()
+        self.external_specified_spans = self.get_external_specified_spans()
+        self.specified_spans = self.get_specified_spans()
+        self.label_span_list = self.get_label_span_list()
+        self.has_predefined_colors = self.get_has_predefined_colors()
+
+    def post_parse(self) -> None:
+        self.containing_labels_dict = self.get_containing_labels_dict()
+        self.specified_substrings = self.get_specified_substrings()
+        self.group_substr_items = self.get_group_substr_items()
+        self.group_substrs = self.get_group_substrs()
+
+    # Toolkits
+
+    def find_spans(self, pattern: str) -> list[Span]:
+        return [
+            match_obj.span()
+            for match_obj in re.finditer(pattern, self.string)
+        ]
+
+    @staticmethod
+    def get_neighbouring_pairs(iterable: Iterable) -> list:
+        return list(adjacent_pairs(iterable))[:-1]
+
+    @staticmethod
+    def span_contains(span_0: Span, span_1: Span) -> bool:
+        return span_0[0] <= span_1[0] and span_0[1] >= span_1[1]
+
+    @staticmethod
+    def compress_neighbours(vals: list[int]) -> list[tuple[int, Span]]:
+        if not vals:
+            return []
+
+        unique_vals = [vals[0]]
+        indices = [0]
+        for index, val in enumerate(vals):
+            if val == unique_vals[-1]:
+                continue
+            unique_vals.append(val)
+            indices.append(index)
+        indices.append(len(vals))
+        spans = LabelledString.get_neighbouring_pairs(indices)
+        return list(zip(unique_vals, spans))
+
+    @staticmethod
+    def find_region_index(seq: list[int], val: int) -> int:
+        # Returns an integer in `range(-1, len(seq))` satisfying
+        # `seq[result] <= val < seq[result + 1]`.
+        # `seq` should be sorted in ascending order.
+        if not seq or val < seq[0]:
+            return -1
+        result = len(seq) - 1
+        while val < seq[result]:
+            result -= 1
+        return result
+
+    @staticmethod
+    def take_nearest_value(seq: list[int], val: int, index_shift: int) -> int:
+        sorted_seq = sorted(seq)
+        index = LabelledString.find_region_index(sorted_seq, val)
+        if index == -1:
+            raise IndexError
+        return sorted_seq[index + index_shift]
+
+    @staticmethod
+    def replace_str_by_spans(
+        substr: str, span_repl_dict: dict[Span, str]
+    ) -> str:
+        if not span_repl_dict:
+            return substr
+
+        spans = sorted(span_repl_dict.keys())
+        if not all(
+            span_0[1] <= span_1[0]
+            for span_0, span_1 in LabelledString.get_neighbouring_pairs(spans)
+        ):
+            raise ValueError("Overlapping replacement")
+
+        span_ends, span_begins = zip(*spans)
+        pieces = [
+            substr[slice(*span)]
+            for span in zip(
+                (0, *span_begins),
+                (*span_ends, len(substr))
+            )
+        ]
+        repl_strs = [*[span_repl_dict[span] for span in spans], ""]
+        return "".join(it.chain(*zip(pieces, repl_strs)))
+
+    @staticmethod
+    def get_span_replacement_dict(
+        inserted_string_pairs: list[tuple[Span, tuple[str, str]]],
+        other_repl_items: list[tuple[Span, str]]
+    ) -> dict[Span, str]:
+        if not inserted_string_pairs:
+            return other_repl_items.copy()
+
+        indices, _, _, inserted_strings = zip(*sorted([
+            (
+                span[flag],
+                -flag,
+                -span[1 - flag],
+                str_pair[flag]
+            )
+            for span, str_pair in inserted_string_pairs
+            for flag in range(2)
+        ]))
+        result = {
+            (index, index): "".join(inserted_strings[slice(*item_span)])
+            for index, item_span
+            in LabelledString.compress_neighbours(indices)
+        }
+        result.update(other_repl_items)
+        return result
+
+    @staticmethod
+    def rslide(index: int, skipped: list[Span]) -> int:
+        transfer_dict = dict(sorted(skipped))
+        while index in transfer_dict.keys():
+            index = transfer_dict[index]
+        return index
+
+    @staticmethod
+    def lslide(index: int, skipped: list[Span]) -> int:
+        transfer_dict = dict(sorted([
+            skipped_span[::-1] for skipped_span in skipped
+        ], reverse=True))
+        while index in transfer_dict.keys():
+            index = transfer_dict[index]
+        return index
+
+    @staticmethod
+    def shrink_span(span: Span, skipped: list[Span]) -> Span:
+        return (
+            LabelledString.rslide(span[0], skipped),
+            LabelledString.lslide(span[1], skipped)
+        )
+
+    @staticmethod
+    def extend_span(span: Span, skipped: list[Span]) -> Span:
+        return (
+            LabelledString.lslide(span[0], skipped),
+            LabelledString.rslide(span[1], skipped)
+        )
+
+    @staticmethod
+    def rgb_to_int(rgb_tuple: tuple[int, int, int]) -> int:
+        r, g, b = rgb_tuple
+        rg = r * 256 + g
+        return rg * 256 + b
+
+    @staticmethod
+    def int_to_rgb(rgb_int: int) -> tuple[int, int, int]:
+        rg, b = divmod(rgb_int, 256)
+        r, g = divmod(rg, 256)
+        return r, g, b
+
+    @staticmethod
+    def color_to_label(color: ManimColor) -> int:
+        rgb_tuple = color_to_int_rgb(color)
+        rgb = LabelledString.rgb_to_int(rgb_tuple)
+        if rgb == 16777215:  # white
+            return -1
+        return rgb
+
+    @abstractmethod
+    def get_begin_color_command_str(int_rgb: int) -> str:
+        return ""
+
+    @abstractmethod
+    def get_end_color_command_str() -> str:
+        return ""
+
+    # Pre-parsing
+
+    def get_full_span(self) -> Span:
+        return (0, len(self.string))
+
+    def get_space_spans(self) -> list[Span]:
+        return self.find_spans(r"\s+")
+
+    @abstractmethod
+    def get_command_repl_items(self) -> list[tuple[Span, str]]:
+        return []
+
+    def get_command_spans(self) -> list[Span]:
+        return [cmd_span for cmd_span, _ in self.command_repl_items]
+
+    def get_ignored_indices(self) -> list[int]:
+        return []
+
+    def get_skipped_spans(self) -> list[Span]:
+        return list(it.chain(
+            self.space_spans,
+            self.command_spans,
+            [
+                (index, index + 1)
+                for index in self.ignored_indices
+            ]
+        ))
+
+    @abstractmethod
+    def get_internal_specified_spans(self) -> list[Span]:
+        return []
+
+    def get_external_specified_spans(self) -> list[Span]:
+        return remove_list_redundancies(list(it.chain(*[
+            self.find_spans(re.escape(substr.strip()))
+            for substr in self.isolate
+        ])))
+
+    def get_specified_spans(self) -> list[Span]:
+        spans = [
+            self.full_span,
+            *self.internal_specified_spans,
+            *self.external_specified_spans
+        ]
+        shrinked_spans = list(filter(
+            lambda span: span[0] < span[1],
+            [
+                self.shrink_span(span, self.skipped_spans)
+                for span in spans
+            ]
+        ))
+        return remove_list_redundancies(shrinked_spans)
+
+    @abstractmethod
+    def get_label_span_list(self) -> list[Span]:
+        return []
+
+    @abstractmethod
+    def get_inserted_string_pairs(
+        self, use_plain_file: bool
+    ) -> list[tuple[Span, tuple[str, str]]]:
+        return []
+
+    @abstractmethod
+    def get_other_repl_items(
+        self, use_plain_file: bool
+    ) -> list[tuple[Span, str]]:
+        return []
+
+    def get_decorated_string(self, use_plain_file: bool) -> str:
+        span_repl_dict = self.get_span_replacement_dict(
+            self.get_inserted_string_pairs(use_plain_file),
+            self.get_other_repl_items(use_plain_file)
+        )
+        result = self.replace_str_by_spans(self.string, span_repl_dict)
+
+        if not use_plain_file:
+            return result
+        return "".join([
+            self.get_begin_color_command_str(
+                self.rgb_to_int(color_to_int_rgb(self.base_color))
+            ),
+            result,
+            self.get_end_color_command_str()
+        ])
+
+    @abstractmethod
+    def get_has_predefined_colors(self) -> bool:
+        return False
+
+    # Post-parsing
+
+    def get_containing_labels_dict(self) -> dict[Span, list[int]]:
+        label_span_list = self.label_span_list
+        result = {
+            span: []
+            for span in label_span_list
+        }
+        for span_0 in label_span_list:
+            for span_index, span_1 in enumerate(label_span_list):
+                if self.span_contains(span_0, span_1):
+                    result[span_0].append(span_index)
+                elif span_0[0] < span_1[0] < span_0[1] < span_1[1]:
+                    string_0, string_1 = [
+                        self.string[slice(*span)]
+                        for span in [span_0, span_1]
+                    ]
+                    raise ValueError(
+                        "Partially overlapping substrings detected: "
+                        f"'{string_0}' and '{string_1}'"
+                    )
+        if self.full_span not in result:
+            result[self.full_span] = list(range(len(label_span_list)))
+        return result
+
+    def get_cleaned_substr(self, span: Span) -> str:
+        span_repl_dict = {
+            tuple([index - span[0] for index in cmd_span]): ""
+            for cmd_span in self.command_spans
+            if self.span_contains(span, cmd_span)
+        }
+        return self.replace_str_by_spans(
+            self.string[slice(*span)], span_repl_dict
+        )
+
+    def get_specified_substrings(self) -> list[str]:
+        return remove_list_redundancies([
+            self.get_cleaned_substr(span)
+            for span in self.specified_spans
+        ])
+
+    def get_group_substr_items(self) -> tuple[list[Span], list[str]]:
+        group_labels, submob_spans = zip(
+            *self.compress_neighbours(self.submob_labels)
+        )
+        ordered_spans = [
+            self.label_span_list[label] if label != -1 else self.full_span
+            for label in group_labels
+        ]
+        ordered_containing_labels = [
+            self.containing_labels_dict[span]
+            for span in ordered_spans
+        ]
+        ordered_span_begins, ordered_span_ends = zip(*ordered_spans)
+        span_begins = [
+            prev_end if prev_label in containing_labels else curr_begin
+            for prev_end, prev_label, containing_labels, curr_begin in zip(
+                ordered_span_ends[:-1], group_labels[:-1],
+                ordered_containing_labels[1:], ordered_span_begins[1:]
+            )
+        ]
+        span_ends = [
+            next_begin if next_label in containing_labels else curr_end
+            for next_begin, next_label, containing_labels, curr_end in zip(
+                ordered_span_begins[1:], group_labels[1:],
+                ordered_containing_labels[:-1], ordered_span_ends[:-1]
+            )
+        ]
+        spans = list(zip(
+            (ordered_span_begins[0], *span_begins),
+            (*span_ends, ordered_span_ends[-1])
+        ))
+        shrinked_spans = [
+            self.shrink_span(span, self.skipped_spans)
+            for span in spans
+        ]
+        group_substrs = [
+            self.get_cleaned_substr(span) if span[0] < span[1] else ""
+            for span in shrinked_spans
+        ]
+        return submob_spans, group_substrs
+
+    def get_group_substrs(self) -> list[str]:
+        return self.group_substr_items[1]
+
+    # Selector
+
+    def find_span_components_of_custom_span(
+        self, custom_span: Span
+    ) -> list[Span]:
+        indices = remove_list_redundancies(list(it.chain(
+            self.full_span,
+            *self.label_span_list
+        )))
+        span_begin = self.take_nearest_value(indices, custom_span[0], 0)
+        span_end = self.take_nearest_value(indices, custom_span[1] - 1, 1)
+        span_choices = sorted(filter(
+            lambda span: self.span_contains((span_begin, span_end), span),
+            self.label_span_list
+        ))
+        # Choose spans that reach the farthest.
+        span_choices_dict = dict(span_choices)
+
+        result = []
+        while span_begin < span_end:
+            if span_begin not in span_choices_dict.keys():
+                span_begin += 1
+                continue
+            next_begin = span_choices_dict[span_begin]
+            result.append((span_begin, next_begin))
+            span_begin = next_begin
+        return result
+
+    def get_parts_by_custom_span(self, custom_span: Span) -> VGroup:
+        spans = self.find_span_components_of_custom_span(custom_span)
+        labels = set(it.chain(*[
+            self.containing_labels_dict[span]
+            for span in spans
+        ]))
+        return VGroup(*filter(
+            lambda submob: submob.label in labels,
+            self.submobjects
+        ))
+
+    def get_parts_by_string(self, substr: str) -> VGroup:
+        return VGroup(*[
+            self.get_parts_by_custom_span(span)
+            for span in self.find_spans(re.escape(substr.strip()))
+        ])
+
+    def get_parts_by_group_substr(self, substr: str) -> VGroup:
+        return VGroup(*[
+            VGroup(*self.submobjects[slice(*submob_span)])
+            for submob_span, group_substr in zip(*self.group_substr_items)
+            if group_substr == substr
+        ])
+
+    def get_part_by_string(self, substr: str, index : int = 0) -> VMobject:
+        return self.get_parts_by_string(substr)[index]
+
+    def set_color_by_string(self, substr: str, color: ManimColor):
+        self.get_parts_by_string(substr).set_color(color)
+        return self
+
+    def set_color_by_string_to_color_map(
+        self, string_to_color_map: dict[str, ManimColor]
+    ):
+        for substr, color in string_to_color_map.items():
+            self.set_color_by_string(substr, color)
+        return self
+
+    def indices_of_part(self, part: Iterable[VMobject]) -> list[int]:
+        return [self.submobjects.index(submob) for submob in part]
+
+    def indices_lists_of_parts(
+        self, parts: Iterable[Iterable[VMobject]]
+    ) -> list[list[int]]:
+        return [self.indices_of_part(part) for part in parts]
+
+    def get_string(self) -> str:
+        return self.string
+
+
+class MTex(LabelledString):
+    CONFIG = {
+        "font_size": 48,
+        "alignment": "\\centering",
+        "tex_environment": "align*",
+        "tex_to_color_map": {},
+    }
+
+    def __init__(self, tex_string: str, **kwargs):
+        digest_config(self, kwargs)
+        tex_string = tex_string.strip()
+        # Prevent from passing an empty string.
+        if not tex_string:
+            tex_string = "\\quad"
+        self.tex_string = tex_string
+        self.isolate.extend(self.tex_to_color_map.keys())
+        super().__init__(tex_string, **kwargs)
+
+        self.set_color_by_tex_to_color_map(self.tex_to_color_map)
+        self.scale(SCALE_FACTOR_PER_FONT_POINT * self.font_size)
+
+    @property
+    def hash_seed(self) -> tuple:
+        return (
+            self.__class__.__name__,
+            self.svg_default,
+            self.path_string_config,
+            self.base_color,
+            self.use_plain_file,
+            self.isolate,
+            self.tex_string,
+            self.alignment,
+            self.tex_environment,
+            self.tex_to_color_map
+        )
+
+    def get_file_path_by_content(self, content: str) -> str:
+        full_tex = self.get_tex_file_body(content)
+        with display_during_execution(f"Writing \"{self.string}\""):
+            file_path = self.tex_to_svg_file_path(full_tex)
+        return file_path
+
+    def get_tex_file_body(self, content: str) -> str:
+        if self.tex_environment:
+            content = "\n".join([
+                f"\\begin{{{self.tex_environment}}}",
+                content,
+                f"\\end{{{self.tex_environment}}}"
+            ])
+        if self.alignment:
+            content = "\n".join([self.alignment, content])
+
+        tex_config = get_tex_config()
+        return tex_config["tex_body"].replace(
+            tex_config["text_to_replace"],
+            content
+        )
+
+    @staticmethod
+    def tex_to_svg_file_path(tex_file_content: str) -> str:
+        return tex_to_svg_file(tex_file_content)
+
+    def pre_parse(self) -> None:
+        super().pre_parse()
+        self.backslash_indices = self.get_backslash_indices()
+        self.brace_index_pairs = self.get_brace_index_pairs()
+        self.script_char_indices = self.get_script_char_indices()
+        self.script_char_spans = self.get_script_char_spans()
+        self.script_content_spans = self.get_script_content_spans()
+        self.script_spans = self.get_script_spans()
+
+    # Toolkits
+
+    @staticmethod
+    def get_begin_color_command_str(rgb_int: int) -> str:
+        rgb_tuple = MTex.int_to_rgb(rgb_int)
+        return "".join([
+            "{{",
+            "\\color[RGB]",
+            "{",
+            ",".join(map(str, rgb_tuple)),
+            "}"
+        ])
+
+    @staticmethod
+    def get_end_color_command_str() -> str:
+        return "}}"
+
+    # Pre-parsing
+
+    def get_backslash_indices(self) -> list[int]:
+        # Newlines (`\\`) don't count.
+        return [
+            span[1] - 1
+            for span in self.find_spans(r"\\+")
+            if (span[1] - span[0]) % 2 == 1
+        ]
+
+    def get_unescaped_char_indices(self, *chars: str):
+        return sorted(filter(
+            lambda index: index - 1 not in self.backslash_indices,
+            [
+                span[0]
+                for char in chars
+                for span in self.find_spans(re.escape(char))
+            ]
+        ))
+
+    def get_brace_index_pairs(self) -> list[Span]:
+        string = self.string
+        indices = self.get_unescaped_char_indices("{", "}")
+        left_brace_indices = []
+        right_brace_indices = []
+        left_brace_indices_stack = []
+        for index in indices:
+            if string[index] == "{":
+                left_brace_indices_stack.append(index)
+            else:
+                if not left_brace_indices_stack:
+                    raise ValueError("Missing '{' inserted")
+                left_brace_index = left_brace_indices_stack.pop()
+                left_brace_indices.append(left_brace_index)
+                right_brace_indices.append(index)
+        if left_brace_indices_stack:
+            raise ValueError("Missing '}' inserted")
+        return list(zip(left_brace_indices, right_brace_indices))
+
+    def get_script_char_indices(self) -> list[int]:
+        return self.get_unescaped_char_indices("_", "^")
+
+    def get_script_char_spans(self) -> list[Span]:
+        return [
+            self.extend_span((index, index + 1), self.space_spans)
+            for index in self.script_char_indices
+        ]
+
+    def get_script_content_spans(self) -> list[Span]:
+        result = []
+        brace_indices_dict = dict(self.brace_index_pairs)
+        for _, span_begin in self.script_char_spans:
+            if span_begin in brace_indices_dict.keys():
+                span_end = brace_indices_dict[span_begin] + 1
+            else:
+                pattern = re.compile(r"[a-zA-Z0-9]|\\[a-zA-Z]+")
+                match_obj = pattern.match(self.string, pos=span_begin)
+                if not match_obj:
+                    script_name = {
+                        "_": "subscript",
+                        "^": "superscript"
+                    }[script_char]
+                    raise ValueError(
+                        f"Unclear {script_name} detected while parsing. "
+                        "Please use braces to clarify"
+                    )
+                span_end = match_obj.end()
+            result.append((span_begin, span_end))
+        return result
+
+    def get_script_spans(self) -> list[Span]:
+        return [
+            (script_char_span[0], script_content_span[1])
+            for script_char_span, script_content_span in zip(
+                self.script_char_spans, self.script_content_spans
+            )
+        ]
+
+    # Parsing
+
+    def get_command_repl_items(self) -> list[tuple[Span, str]]:
+        color_related_command_dict = {
+            "color": (1, False),
+            "textcolor": (1, False),
+            "pagecolor": (1, True),
+            "colorbox": (1, True),
+            "fcolorbox": (2, True),
+        }
+        result = []
+        backslash_indices = self.backslash_indices
+        right_brace_indices = [
+            right_index
+            for left_index, right_index in self.brace_index_pairs
+        ]
+        pattern = "".join([
+            r"\\",
+            "(",
+            "|".join(color_related_command_dict.keys()),
+            ")",
+            r"(?![a-zA-Z])"
+        ])
+        for match_obj in re.finditer(pattern, self.string):
+            span_begin, cmd_end = match_obj.span()
+            if span_begin not in backslash_indices:
+                continue
+            cmd_name = match_obj.group(1)
+            n_braces, substitute_cmd = color_related_command_dict[cmd_name]
+            span_end = self.take_nearest_value(
+                right_brace_indices, cmd_end, n_braces
+            ) + 1
+            if substitute_cmd:
+                repl_str = "\\" + cmd_name + n_braces * "{white}"
+            else:
+                repl_str = ""
+            result.append(((span_begin, span_end), repl_str))
+        return result
+
+    def get_ignored_indices(self) -> list[int]:
+        return self.script_char_indices
+
+    def get_internal_specified_spans(self) -> list[Span]:
+        # Match paired double braces (`{{...}}`).
+        result = []
+        reversed_brace_indices_dict = dict([
+            pair[::-1] for pair in self.brace_index_pairs
+        ])
+        skip = False
+        for prev_right_index, right_index in self.get_neighbouring_pairs(
+            list(reversed_brace_indices_dict.keys())
+        ):
+            if skip:
+                skip = False
+                continue
+            if right_index != prev_right_index + 1:
+                continue
+            left_index = reversed_brace_indices_dict[right_index]
+            prev_left_index = reversed_brace_indices_dict[prev_right_index]
+            if left_index != prev_left_index - 1:
+                continue
+            result.append((left_index, right_index + 1))
+            skip = True
+        return result
+
+    def get_label_span_list(self) -> list[Span]:
+        result = self.script_content_spans.copy()
+        for span_begin, span_end in self.specified_spans:
+            shrinked_end = self.lslide(span_end, self.script_spans)
+            if span_begin >= shrinked_end:
+                continue
+            shrinked_span = (span_begin, shrinked_end)
+            if shrinked_span in result:
+                continue
+            result.append(shrinked_span)
+        return result
+
+    def get_inserted_string_pairs(
+        self, use_plain_file: bool
+    ) -> list[tuple[Span, tuple[str, str]]]:
+        if use_plain_file:
+            return []
+
+        extended_label_span_list = [
+            span
+            if span in self.script_content_spans
+            else (span[0], self.rslide(span[1], self.script_spans))
+            for span in self.label_span_list
+        ]
+        return [
+            (span, (
+                self.get_begin_color_command_str(label),
+                self.get_end_color_command_str()
+            ))
+            for label, span in enumerate(extended_label_span_list)
+        ]
+
+    def get_other_repl_items(
+        self, use_plain_file: bool
+    ) -> list[tuple[Span, str]]:
+        if use_plain_file:
+            return []
+        return self.command_repl_items.copy()
+
+    def get_has_predefined_colors(self) -> bool:
+        return bool(self.command_repl_items)
+
+    def get_cleaned_substr(self, span: Span) -> str:
+        substr = super().get_cleaned_substr(span)
+        if not self.brace_index_pairs:
+            return substr
+
+        # Balance braces.
+        left_brace_indices, right_brace_indices = zip(*self.brace_index_pairs)
+        unclosed_left_braces = 0
+        unclosed_right_braces = 0
+        for index in range(*span):
+            if index in left_brace_indices:
+                unclosed_left_braces += 1
+            elif index in right_brace_indices:
+                if unclosed_left_braces == 0:
+                    unclosed_right_braces += 1
+                else:
+                    unclosed_left_braces -= 1
+        return "".join([
+            unclosed_right_braces * "{",
+            substr,
+            unclosed_left_braces * "}"
+        ])
+
+    # Method alias
+
+    def get_parts_by_tex(self, tex: str) -> VGroup:
+        return self.get_parts_by_string(tex)
+
+    def get_part_by_tex(self, tex: str) -> VMobject:
+        return self.get_part_by_string(tex)
+
+    def set_color_by_tex(self, tex: str, color: ManimColor):
+        return self.set_color_by_string(tex, color)
+
+    def set_color_by_tex_to_color_map(
+        self, tex_to_color_map: dict[str, ManimColor]
+    ):
+        return self.set_color_by_string_to_color_map(tex_to_color_map)
+
+    def get_tex(self) -> str:
+        return self.get_string()
+
+
+class MTexText(MTex):
+    CONFIG = {
+        "tex_environment": None,
+    }
diff --git a/manimlib/mobject/svg/text_mobject.py b/manimlib/mobject/svg/text_mobject.py
index 98fc6dbe..2ddd53f7 100644
--- a/manimlib/mobject/svg/text_mobject.py
+++ b/manimlib/mobject/svg/text_mobject.py
@@ -16,7 +16,7 @@ from manimpango import MarkupUtils
 
 from manimlib.logger import log
 from manimlib.constants import *
-from manimlib.mobject.svg.mtex_mobject import LabelledString
+from manimlib.mobject.svg.labelled_string import LabelledString
 from manimlib.mobject.types.vectorized_mobject import VGroup
 from manimlib.utils.customization import get_customization
 from manimlib.utils.tex_file_writing import tex_hash