Latin rēgulāris

→ English regular (derived)

→ Old French reguler (borrowed)

→ Indonesian reguler (derived)

→ Italian regolare (mention)

→ Latin irregularis (affix)

→ Latin regularitas (mention)

→ Latin regulariter (affix)

→ Norman rédgulyi (mention)

→ Norman irrédgulyi (mention)

→ Polish regularny (borrowed)