Can you be a Christian if you don't believe on the Trinity?

Firstly consider the word ‘trinity’ is not found in the Bible.

Trinity comes from a tradition based on a train of thought of parsing the Godhead.

A Christian student is expected to open the Bible and let it speak for itself. Leave behind the traditions of men that make void the word of God.

The Bible says God owns all souls. Your soul is what you are. A human being. An equal member of the whole human family in God’s eyes.

Your spirit is who you are. Your spirit is the intellect of your soul. It is your freewill character. Your reactive attitude that motivates your thoughts, intents and actions. Your spirit is what you will be judged on.

The Bible says there is one God. יְהֹוָה Yahovah or commonly Jehovah.

The Bible says Yahovah’s righteous right arm is מָשִׁיחַ יְהוֹשׁוּעַ Yashua Messiah a.k.a. Jesus Christ . Jesus Christ transliterated means ‘Salvation of Yahovah’.

Jesus Christ is God’s Minister of Salvation. Psalms 22 and 35 prophetically state the very soul of God Himself (a part of it) was in Jesus Christ. Referred to as His ‘darling’ יָחִיד yâchîyd, meaning the only begotten, first and foremost in importance.

The intellect of the precious soul of our Lord Jesus Christ is His spirit.

No guile, no malice and no corruption was found in our Lord Jesus Christ’s spirit. The character of the Lord Jesus Christ is the Holy Spirit.

Mankind has a 100% failure rate at governing themselves. Our governments set up entity’s like ‘The Ministry of Defence’ or the ‘Ministry of Transportation’. These entity’s are part of the structural fabric of the government itself.

God, our Heavenly Father set up a ‘Ministry of Salvation’. Jesus Christ, our precious Saviour is part of the darling structural fabric of God Himself. 

The Bible says God engineered a part of Himself to manifest a little lower than the angels and walk amongst us as Jesus Christ. He was tempted and tried by Satan and suffered beyond our comprehension. 

Jesus Christ took the lowest earthly position for us. He was not guilty. He was innocent. Jesus Christ did not compromise with evil. When He laid down His life at the appointed time it gave Him the universal right to set up a Kingdom of Heaven that is universally legitimate that will not accommodate evil. 

A valid Kingdom for whom so ever will.

Satan has something on all of us. 

Satan has nothing on our Lord Jesus Christ and neither do any of us.

God will not violate the principles of freewill. God allows us to believe and pursue whatever we want. But you can not violate the principles of God without consequence.

With that being said, to answer this question. 

Whatever terminology anyone personally requires to comprehend the Godhead and God’s character is fine as long as you can document it from God’s word like I did for you in this post.

Praise the Lord and may God bless you.