Capitalization is the correct spelling.
"Thursday" in Spanish is "jueves". It is not capitalized.
The dog breed is capitalized as "Rottweiler".
It is spelled "enero", and is not capitalized.
Any dog breed should be capitalized.
février (month names are not capitalized in French)
The capitalized abbreviation (Feb.) stands for the month February.
No. It is not a proper nou n.
The name of the Khmer language in Vietnam is capitalized as Puoc.
You have spelled it correctly though it should be capitalized.
The Christian religion classification, capitalized, is spelled "Protestant".
That is the correct spelling of the dog breed, capitalized as Pekingese.
The temperature scale is Celsius (capitalized, or abbreviated °C).