[Housetek]

my Japaneses is pretty poor, and i always try to talk to people.

If all else fails just say Wakarimasen or Eego De daijobu Desu ka?

basically i dont understand and is english okay?

From my experience many japanese know Basic english, teens are better then most adults.

And they will do their best to use body language to communicate.
They will not make fun of you, cuz that would be rude, and Japanese are very polite people.

They are also embarrassed to speak English because they are thought to be made fun of or laughed at.

So if you try to speak Japanese and cant communicate 100% then at least you tried and it will make them more comfortable to try to speak a little english.