Getting errors like this when burning non-English subtitles?
[Parsed_subtitles_0 @ 0x561d3a0b3b80] Glyph 0x6709 not found, selecting one more font for (Sans, 700, 0)
[Parsed_subtitles_0 @ 0x561d3a0b3b80] Glyph 0x4E9B not found, selecting one more font for (Sans, 700, 0)
[Parsed_subtitles_0 @ 0x561d3a0b3b80] Glyph 0x4EBA not found, selecting one more font for (Sans, 700, 0)
[Parsed_subtitles_0 @ 0x561d3a0b3b80] Glyph 0x505A not found, selecting one more fon........
Usually LIbreoffice gets it right, but if it opens a normal English CSV as UTF-16 by default and shows Asian languages, you'll have ot manually open to fix it (don't double click the file from the File Manager).
Solution - Manually Open the File After Opening LibreOffice Calc
You'll see it is defaulting to UTF-16 which breaks everything.
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Choose "Phrase Variable Name Only"
Search for: welcomemail
Edit the "Translation" box with what you'd like in it.........