Swear in Japanese?

Yes, go on youtube and see the Naruto movies. They contain language like heck. Oh and yeah. Japanese only but they have English subtitles.

i usually say "kuso" which i think means f*ck or "chikuso" which is what my friend says and usually hear that on anime

Japan in Japanese is Nippon or Nihon. The Japanese language is 'nihongo' in Japanese, and a Japanese person is called 'nihonjin.' Written in Japanese:日本 -- Japan日本語 -- Japanese...

Stephen Lawrence Schwartz [b. March 6, 1948] states that he worked extensively via meetings and emails with the translators for the Japanese production of 'Wicked.' Without sufficient familiarity...

どう日本語を学んだ？ (dou ninhongo wo mananda) means "How did you learn Japanese?".