You seem to think the honor we render the Theotokos with our lips is just meaningless "flowery language", and that you are not actually bound to honor her with your heart. We do not honor the Theotokos out of formality; we do it because she deserves it. In her liturgical services, the Church proclaims the truth of Christ. We do not worship God with "vain repetitions" or so-called flowery language. My post above does not contain examples of flowery language, it contains examples of solemn truth proclaimed in the Spirit by the Church.
In short, the liturgical tradition of the Church is accurate, authoritative, and cannot be dismissed as "flowery language".
As to "spouse of the Holy Spirit", AFAIK that is a specifically RC term. I don't recall having heard it used in an Orthodox Church.
But "Bride of God" is definitely true and definitely part of our liturgical tradition and prayer life.
Even if "Bride of God" weren't part of our tradition (which it clearly, undeniably is), the point is still the same when you consider Mary as the "Mother of God". As God's Mother she is our Mother, Queen, and Mistress/Lady (Slavonic владичица).
THE ORTHODOX CHURCH teaches about the Mother of God that which Sacred Tradition and Sacred Scripture have informed concerning Her, and daily it glorifies Her in its temples, asking Her help and defense. Knowing that She is pleased only by those praises which correspond to Her actual glory, the Holy Fathers and hymn-writers have entreated Her and Her Son to teach them how to hymn Her. “Set a rampart about my mind, 0 my Christ, for I make bold to sing the praise of Thy pure Mother” (Ikos of the Dormition). “The Church teaches that Christ was truly born of Mary Ever-Virgin” (St. Epiphanius, “True Word Concerning the Faith”). “It is essential for us to confess that the holy Ever-Virgin Mary is actually Theotokos (Birth-giver of God), so as not to fall into blasphemy. For those who deny that the Holy Virgin is actually Theotokos are no longer believers, but disciples of the Pharisees and Sadducees” (St. Ephraim the Syrian, “To John the Monk”).
There is no intellect or words to express the greatness of Her Who was born in the sinful human race but became “more honorable than the Cherubim and beyond compare more glorious than the Seraphim.”“Seeing the grace of the secret mysteries of God made manifest and clearly fulfilled in the Virgin, I rejoice; and I know not how to understand the strange and secret manner whereby the Undefiled has been revealed as alone chosen above all creation, visible and spiritual. Therefore, wishing to praise Her, I am struck dumb with amazement in both mind and speech. Yet still I dare to proclaim and magnify Her: She is indeed the heavenly Tabernacle” (Ikos of the Entry into the Temple). “Every tongue is at a loss to praise Thee as is due; even a spirit from the world above is filled with dizziness, when it seeks to sing Thy praises, 0 Theotokos. But since Thou art good, accept our faith. Thou knowest well our love inspired by God, for Thou art the Protector of Christians, and we magnify Thee” (Irmos of the 9th Canticle, Service of the Theophany).