To what extent do such conditions vary from culture to culture?

The symbolism of the stars varies from culture to culture.

The nature of this feeling varies from person to person and culture to culture.

The kinds of foods used vary widely from culture to culture.

There are thousands of exceptions, and doctors say behavior varies from culture to culture.

The appearance of a frown varies from culture to culture.

But I think you mean customary use of names, and that varies from culture to culture.

Whether presents are given at these engagement parties varies from culture to culture.

While this varies from culture to culture, the use of necronyms is quite common.

What is an acceptable display of affection varies with respect to culture and context.