Not exactly a website with parallel texts, but you may find this one useful:

URL:
http://perso.wanadoo.fr/duke.traduction/fintrad/glossaire_fr.htm#S

LANG: EN FR

SRC: Fintrad > Translator Traduction financière, traduction
économique et traduction juridiques. Fintrad.com traductions
financières

KWD: financial glossary, glossaire financière

CMT: Fintrad.com is a concern specializing in FR>EN and EN>FR
translation. The owner describes it as comprising a network of
specialist translators serving the needs of professionals working in
the areas of finance and banking.

The author states this "Glossaire financier" is updated regularly and
furthermore invites visitors to send him their own glossaries for
inclusion.

Kind regards,

Peter Field.

Freelance translator/translation editor (FR>EN)