Some types of pink eye are very contagious (easily spread from person to person). There are three main types of conjunctivitis. Viral conjunctivitis is the most common type of pink eye. This conjunctivitis is very contagious and often spreads through schools and other crowded places.
Mauritania's official languages are French and Hassaniyya Arabic. Hassaniyya is an Arabic language with many other words mixed in. Many people in the larger cities and villages speak French. The other main languages are Azayr, Fulfulde, Mande-kan, and Wolof.
You did have seperate regions with different dialects such as Ripuarian (South of belgium till west of Germany) Moselle Franconian (Luxemburg and the area around it ) and Frankish (netherlands, belgium and part of germany + Elzas). in Luxemburg they still speak some kind of mix between German and French.