Q: i need a tablets please give a advice,

You can set the iPad to use almost any language: http://support.apple.com/kb/HT2371

How many GB is difficult to answer, and depends on what you want to do with the iPad. 64 GB is enormous, and 16 GB is not enough, but that is just my opinion.

Here is a general guide to how much an iPhone can hold (it applies to the iPad as well): http://support.apple.com/kb/HT1867

16GB vs 32GB vs 64GB: Which new iPad storage capacity should you get?

http://www.imore.com/2012/03/08/16gb-32gb-64gb-ipad-capacity/

 Cheers, Tom