He cannot speak French let alone write it.

他不会讲法语，更谈不上写作了。

youdao

He cannot speak French, let alone write a letter in it.

他不会说法语，更谈不上用法语写信了。

youdao

He cannot speak French, let alone write a letter in it.

他不会说法语，更谈不上用法语写信了。

youdao