Royal Fiance (not comedy)
Ikoku Irokoi Romantan
How about this one? :D
http://www.mangago.zone/read-manga/taiyou_no_kikoushi/
Seme-type character seems foreign: http://www.mangago.zone/read-manga/the_baker_on_the_first_floor/
Foreigner is a seme nudist: http://www.mangago.zone/read-manga/razoku_no_hanayome/
Foreign younger seme (?) x Old Actor: http://www.mangago.zone/read-manga/the_rain_in_montecarlo/
Probz not one your looking for but I'll add it anyway
Everyones a foreigner (creative yaoi adaptations of known fairytales): http://www.mangago.zone/read-manga/ever_after/mf/c001/14/
Seme is a halfie (not comedy, though): http://www.mangago.zone/read-manga/sakura_gari/
Any manga suggestions where the seme is a foreigner? It would be even better of this manga was a comedy or if the foreigner were royalty or something.
Please and thank you!