Well, pretty much everything about Hinduism is demonic, or at least potentially demonic. Hinduism is merely a very sophisticated form of paganism - paganism being a system of belief whereby elements of creation itself (or the “spirits” of these created elements) are proclaimed to be “divine” and worshipped as if they are “gods.” This is what Hinduism does, and in regard to paganism we are taught by the Apostles themselves in Scripture that the so-called “gods” of paganism are actually demons. E.G., in 1 Cor. 10:20-21, St. Paul says:
“… the sacrifices of pagans are offered to demons, not to God, and I do not want you to be participants with demons. You cannot drink the cup of the Lord and also the cup of demons; you cannot have a part in both the Lord’s table and the table of demons.”
We are Christians it is very difficult to understand something in another language and culture.
It’s not difficult if one takes the time to become educated on such things, especially as there is the need to discern what is or isn’t acceptable for us to believe and practice as Christians. It’s presumptuous and dangerous to dive headlong into something thinking we can sort the differences out afterwards or to assume that because something is “spiritual” it is therefore, at the worst, benign.
The Hindu religion has been around much longer than our own.
Has it? This is a secular-liberal perspective which denies what we are told in Divine revelation that, in the Beginning, man did know the God of Israel. It was only through isolation from Him (through the sin of our first parents and their immediate descendants) that man embraced the error or paganism, i.e., worshipping created elements or created spirits (i.e., angelic beings or demons) as if they are Divine.
To attempt to grasp it on our terms would take years of study.
Welcome to real Catholic scholarship.

The Church has done its homework on this subject and offers you correct instruction on it.
All I have tried to suggest here is the similarity between this Hindu word and the Christian holy spirit.
But there is no such similarity. We know of the Holy Spirit and His Divinity through Divine revelation (and please note that Holy Spirit is capitalized). He is not known in Hinduism.
Obviously they are not manifested the same between two different cultures and religions.
“They”? The Holy Spirit is not known to Hinduism
at all. Hinduism, as I touched on above, makes no distinction between Divinity and the created universe. As with all forms of paganism, Hinduism worships the universe itself. We Christians, otoh, do not believe that the Holy Spirit is part of the created universe, but that He is God and thus a Being Who is distinct from the created universe and Who transcends and is over and above the created universe, and Who is actually its Creator and Author. There is no place for this concept in Hinduism, which is what makes Christianity different from it.
But as all of creation is of God I do not think that it is impossible for the holy spirit to exist for non christians and obviously they would not use the same name.
Apples and oranges. While the Holy Spirit (as God and Author of Creation) obviously touches the lives of all human beings, at least in His creating them and keeping them in existence, it is quite another thing to claim that Hinduism itself (as a belief system) has a concept of the Holy Spirit or that it believes what we believe about the Holy Spirit. You seem misled because you do not grasp What or Who the Holy Spirit is or why we Christians believe in a Holy Spirit.The Holy Spirit, as it says in Romans 8:15, is the Spirit of Sonship which exists eternally between God the Father Who eternally begets God the Son and God the Son Who is eternally begotten of God the Father. In Christ, we participate in this Divine Sonship and thus receive the Holy Spirit. Yet, without this concept of Divine Sonship there is no reason to believe in a Personal or Divine Holy Spirit. Therefore, the Hindus do not believe in Him.
The bible refereances many times the preparation of the bride(soul) to unite in the bridal chamber with her husband(holy spirit).
The “Bride” in Scripture is not the soul, but the Church itself (see Eph. 5:25-32), and also each individual member of the Church, which is the Bride of Christ because it is the
Body of Christ - one-Flesh with Christ the Bridegroom. IOW, the Church in this world is a mysterious extension of Christ’s own human Incarnation: His hands, and voice, etc. So, the Bridegroom-Bride motif is a “
Flesh and Blood” dynamic, a reference to the “one-Flesh” Covenant between the Incarnate Jesus Christ and His Church (and each individual member of His Church).
continued. . .