There is one dictionary, "Gallaic to..."
that can be used to look up the corresponding meaning or word for
a Gallaic word in another Celtic language or a Romance language
with substantial Celtic loanwords from it's originally Celtic-speaking
population or in the world language, English, which itself has Celtic
features from the Celtic languages it submerged.
There are also dictionaries to look up the corresponding
Gallaic word for a word in the other languages of the Iberian pensinsula
with populations that were originally predominantly Celtic-speaking
(Galego and Asturianu, Portuguese or Spanish) or in the world language,
These dictionaries are a work in progress and new
sources are becoming available all the time. We anticipate major
additions soon from archaelogical digs currently underway in the
ancient Celtic hearlands of the Iberian peninsula and from linguistic
and document research.