About Welsh transcription
Welsh (Cymraeg) is written in the Latin alphabet and spoken principally in Wales. Subtitles generated here come back in that script, as ordinary written Welsh, ready to use in an SRT or VTT file.
Welsh changes the first consonant of a word depending on the grammar around it, so the same word appears in a transcript under several different opening letters — that is correct, not an inconsistency. Pairs like ll, dd, ch and ff count as single letters, and English is mixed into most conversational Welsh.

