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This character is debonair and very attractive. Very sexily attractive, and has a sexy accent to top it off.
But their knowledge of the common language is worse than just having a shaky accent... they get idioms comically wrong, all the time, in their sexy accent, ruining the effect. They'll say "Boum, schockolat" instead of "boom, shakalaka," for example.
When other characters try to correct them, they just flip their hair sexily and say, "My vairsion is bettair."