Convert Part of Subscript Files to Math Form

Question

I have french subscript file here: https://uploadfiles.io/iehon

If you download it an open it with Word, you can see that the math sections are but between $<i>$ and <\i>:

To import the file I use:

(*Importing*)
importSub = Import[FILEPATH, "Text", CharacterEncoding -> "UTF8"];
(*Deleting empty list elements*)
subtitle = DeleteCases[StringSplit[ToString[importSub], "\n"], ""];

In the end I want to convert the subtitles into Latex using TeXForm[...] but therefore, I need to convert the parts between $<i>$ and $<\i>$ to Mathematica Math Input.

Does anyone know how I can do that ?

Answer 1

Not a complete answer, but a bit long for a comment.

(* Positions of substrings delimited by <i>...</i> *)
delimited = StringPosition[importSub, Shortest["<i>" ~~ __ ~~ "</i>"]];

(* Extract 'math' substrings *)
math = StringTake[importSub, {First[#] + 3, Last[#] - 4}] & /@ delimited

I don't know anything about TeX so I cannot tell if mapping TeXForm on the math substrings generates the correct output or not. If it is correct, then the substrings in importSub can be replaced by the TeXForm. Deleting empty strings can be done after that.