Perform find/replace on specific section of text

I have a .jsee macro which makes various transformations on text and I want to specifically target part of this text for some find/replace operations.

For example, this could be the full text:

Kyrgyz: укта; Lao: ນອນ; Latgalian: gālēt; Latin: gālēt, gulēt; Latvian: gulēt, dusēt; Lenape Unami: kawi; Limburgish: slaope; Lithuanian: miegoti; Livonian: maggõ;

And I would like to perform some character replacements only on the words/phrases contained in the Latin language section (Latin: gālēt, gulēt;). without affecting any other text, even if there is a match. (Languages are delimited with “;”) For example, I would like to apply these operations:

// Remove Latin accents
document.selection.Replace("ā","a",eeReplaceAll,0);
document.selection.Replace("ē","e",eeReplaceAll,0);
document.selection.Replace("ī","i",eeReplaceAll,0);
document.selection.Replace("ō","o",eeReplaceAll,0);
document.selection.Replace("ū","u",eeReplaceAll,0);
document.selection.Replace("ȳ","y",eeReplaceAll,0);