Two different problems.
MULTILINGUAL
The same content in different languages.
The audience differs by what they read.
MULTI-REGION
Different content for different places: prices, delivery, availability, legal terms.
The audience may read the same language.
WHAT THAT MEANS PRACTICALLY
A Nigerian and a Ghanaian customer may both read English and need different prices and delivery information.
That is a regional problem, not a language one.
WHY THE DISTINCTION MATTERS
Language versions are handled by translation.
Regional versions are handled by content differences and sometimes separate sites.
MANY SITES NEED ONE, NOT BOTH
Decide which problem you actually have.
WHEN YOU NEED BOTH
Operating in several countries with different languages.
That is genuinely complex. Plan it properly.
WHAT MOST SMALL BUSINESSES NEED
Neither, or a single regional variation.