Categories, languages, and filters do not influence the glyphs order in the exported font.
Instead, glyphs are ordered by their sort name.
Define a custom order for all glyphs of the font with the
glyphOrder custom parameter in File → Font Info… → Font (Cmd-I).
The parameter takes a list of glyph names, one name per line.
The order of glyphs is used both in Font View and in exported font files.
When opening an OTF or TTF font file, Glyphs preserves the glyph order of the file by automatically adding a
glyphOrder custom parameter when Keep Glyph Names from Imported Files is selected.
See User Settings for details.