你觉得那种语言最容易学 should be acceppted
It's very rare to hear people say 学哪种语言最容易. 哪种语言最容易学 is more natural and common.
Learn - 學
that's traditional, not simplified
Which language do you think is...
Again! They do not admit the answer they provide themselves! (it requires "...DO you think..." now). It's unacceptable!