In File->Properties, Font tab, there is "Font scripts to embed" group (since commit eb6ff07605a55675e7007ac0cb5604fb13a9ddf9), which contains "Latin fonts". This element controls Latin, Greek, and Cyrillic scripts; it matches the "Western" element in Options->Languages and Locales->General. The name of "Latin fonts" must be changed, possibly to "Western fonts".
Yes, agree it should be 'Western' to match our ODF language "trifecta" of 'Western', 'Asian', and 'Complex text layout'.