Fo shizzl we gonna b good friendz.

"fo shizzle ma nizzle" is a bastardization of "fo' sheezy mah neezy" which is a bastardization of "for sure mah nigga" which is a bastdardization of "I concur with you whole heartedly my African american brother"
urban dictionary的解释.翻译如下：
“fo shizzle ma nizzle”是“fo' sheezy mah neezy”的不规则用法,后者又是“for sure mah nigga”的不规则用法.“for sure mah nigga” 又是“ i concur with you whole heartedly my african american brother”的滥用.意思是“跟你同心,我的非洲兄弟.”
所以呢fo shizzl就是 for sure（语源：史奴比~说过的.然后传开了.）
整句就是for sure we gonna be good friends=我们当然会成为好朋友.

是不是法语啊？看着有点像！

因为她,我们成为了好朋友!
shizzl 她
这是英语文言文

It has two meanings, 'Sure' and 'Shit'. It all depends on the way you say it.
Sure - 'Fo Shizzle' = For Sure, Definately
Shit - 'That's The Shizzle' = That is good.

shizzl不是英文单词。
你确定这是英语吗？
应该是小语种（也不是德语，本人就是学德语的，刚查了字典，没有这个词）.