Eritis amici/amicae semper.
"The friends and the voice" translates to amici et vox in Latin.
Friends forever
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.
"Always a soldier" in Latin is Semper miles.
Latin countries are friends of Russia, Western countries with Europe don't want to be friends of Russia.
Amici/cae/ca.
Meus amicitia
No, best friends do not always have the same friend. We do not have to force our friends to others.
Semper
Amicus curaie
posse comitātūs