From what I've heard
French
Italian
Portuguese
The languages most closely related to Latin are Italian, French, Spanish, Portuguese, and Romanian.
The closest living languages to Spanish are:PortugueseCatalánGalcianoOccitanLadino
Spanish is closely related to other Romance languages, such as Portuguese, Italian, and French. These languages all evolved from Latin and share similarities in vocabulary, grammar, and sentence structure.
Italian Portuguese French
The language most closely related to Castilian - what we know as "Spanish" - are probably other Romance languages spoken in Spain: Galician, Aragonese, Asturian, Extremaduran, Catalan, and other regional tongues (with the exception of Basque, which is in its own little category). Portuguese and Italian are very closely related too. French probably comes next, and Romanian trails behind it as a bastard half-sibling twice removed. I hope that's what you were looking for!
French is a Romance language, so it is closely related to other Romance languages such as Spanish, Italian, Portuguese, and Romanian. These languages share common roots from Latin and have similarities in vocabulary and grammar.
The languages most closely related to Latin are the other members of the Italic branch within the Indo-European language family, such as Oscan, Umbrian, and Faliscan. Among modern languages, the Romance languages (e.g. Italian, French, Spanish, Portuguese) are the most direct descendants of Latin.
Panamian Spanish, which is closely related to Colombian Spanish and Caribbean Spanish.
They are related, they belong to the Latin language family.
the tribal languages of central and southeastern siberia
Yes, Portuguese is a Romance language. It is derived from Latin and is closely related to other Romance languages such as Spanish, French, and Italian.
Spanish, Galician, Catalan, Italian, French. Romanian also comes from Latin.