が言ってたよ

said

→ が
phrase Uncommon #15,481
said An informal way to report what someone said, often translated as “X said...” or “X told me...”. 言ってた is the conversational form of 言っていた, and よ adds emphasis or signals new information.
JA: メアリーは怒ってないって、トムが言ってたよ。
EN: Tom said that Mary isn't angry.

メアリーフランス語を話すが得意だってトムが言ってたよ

Tom said that Mary is good at speaking French.

メアリー怒ってないってトムが言ってたよ

Tom said that Mary isn't angry.

メアリーができるかどうかは分からないってトムが言ってたよ

Tom said he doesn't know whether Mary can do it.

フランス語は話せないってトムが言ってたよ

Tom said he can't speak French.

メアリーすごく酔ってるってトムが言ってたよ

Tom said Mary was really drunk.

戻ってきてくれて嬉しいってトムメアリーが言ってたよ

Tom and Mary said they were happy you came back.

メアリー前にも泥棒に入られたことがあるってトムが言ってたよ

Tom said that Mary’s place had been broken into before, too.

メアリー怒らないだろうってトムが言ってたよ

Tom said Mary probably wouldn’t get angry.

オーストラリアに戻るつもりはないってトムが言ってたよ

Tom said he has no intention of going back to Australia.

メアリーフランス語を話せた知らなかったってトムが言ってたよ

Tom said he didn't know Mary could speak French.

昨日メアリーを見かけたってトムが言ってたよ

Tom said he saw Mary yesterday.

前にボストンに行ったことがあるってトムが言ってたよ

Tom said he had been to Boston before.