あいつは口ばかりで、誠意がないね。巧言令色少なし仁とはよくいったもんだ。の英語

They say fine words are no virtue if they're insincere and that's him in a nutshell. He's all talk but doesn't mean a word of it.

He is simple, unpretentious [unaffected] and very sincere.

He may be a poor talker and far from shrewd, but I like him all the better for that.

He is a man of few words, while his wife is a great chatterbox.

It is true that he is smart, but he is lacking in sincerity.

He's sometimes rough in his speech, but at heart he's a kindhearted man.

He certainly uses aggressive language but in reality he's something of a coward.

He has a rough tongue but is [has] a gentle nature.

This guy is really wishy-washy. He couldn't make a decision to save his life.

His dress is that of a gentleman but his speech and behavior are those of a clown.

He is honest and not twisted.

His bark is worse than his bite.

He dresses like a gentleman, but he speaks and behaves like a clown

His dress is that of a gentleman, but his speech and behaviour are those of a clown.

He may be called frugal―or stingy.

Admittedly, he is lacking in sincerity, but he is an able man.

He is a glib talker, but his handwriting is poor.

He doesn't act all high mighty and is polite.

He is reticent but kind.

Isn't he gorgeous? - So tall and smart-looking.

They are polite and considerate.

I don't want to talk to that bloke ever again.

He has a foul tongue, but is, at heart,―at bottom,―a good fellow.

He hardly speaks but he's kind.

He doesn't say much but what he does say is to the point.

True, he is very methodical, but to put it the other way around, he is inflexible.

He was impolite, not to say rude.

She may speak harsh words, but deep inside she is a kind person, you know.

He has a foul tongue, but he means no harm―means no offence.

His dress is that of gentleman, but his speech and behavior are those of a clown.