It's all man-made-up unscriptural nonsense as is the apostle's creed which is unscriptural.
What is unscriptural or nonsense about using the English word "catholic"? It means "world-wide". Is the church world-wide? Yes, and that is scriptural:
“And they sang a new song, saying: "You are worthy to take the scroll, And to open its seals; For You were slain, And have redeemed us to God by Your blood
Out of every tribe and tongue and people and nation,” (Re 5:9 NKJV)
As I said, "catholic" with a small c has nothing to do with the Roman Catholic denomination.
What is unscriptural about the Apostles' Creed? Here it is - perhaps you could tell us which things it says which are not in the bible:
I believe in Jesus Christ, his only Son, our Lord,
who was conceived by the Holy Spirit,
born of the Virgin Mary,
suffered under Pontius Pilate,
was crucified, died, and was buried;
he descended to the dead.
On the third day he rose again;
he ascended into heaven,
he is seated at the right hand of the Father,
and he will come to judge the living and the dead.
I believe in the Holy Spirit,
the holy catholic Church,
the communion of saints,
the forgiveness of sins,
the resurrection of the body,
and the life everlasting.
Amen.