One of the horrible things (or hilarious things, depending on your point of view) of learning another language, particularly if you are training yourself to think in that language, is that vocab can bleed into your daily conversations. My friends found it hilarious when I was learning French and Czech because halfway through sentences I'd suddenly switch languages without realising (I think the funniest time was when I accidentally started off in Czech before finishing in French, only hitting English mid-sentence). If it is a socially acceptable language it is fine, but if it is in a language its socially acceptable to mock, like Japanese (and Spanish, when I was young, learning Spanish was seen as mockable) starting in English and accidentally switching vocab is a fast ticket to being abused.

Its sad people trying to learn, even if it is sometimes in a clumsy and piecemeal fashion, another language are made fun of. I wonder how many people were turned off languages because of this.