Eritis amici/amicae semper.
"The friends and the voice" translates to amici et vox in Latin.
Friends forever
"Always a soldier" in Latin is Semper miles.
If you have a Latin (make sure you always capitalize Latin) set then you always read/write in Latin.
Siempre is definitely not a Latin word. It is modern Spanish for "always". It derives from the Latin word semper.
No, best friends do not always have the same friend. We do not have to force our friends to others.
Amici/cae/ca.
Meus amicitia
Semper
Latin countries are friends of Russia, Western countries with Europe don't want to be friends of Russia.
posse comitātūs
Amicus curaie