Manuel Célio Conceição directed or co-directed several international research projects, in particular in his fields of specialisation: multilingual terminologies, quality assessment in language teaching, and intercultural communication. These projects include REFORTERM – Reformulação e terminologia; REALITER – Pan-latin network for terminology; a thematic network project (TNP Languages III) on Language industries related professions; Intercultural communication as part of the LANQUA programme (Language network for quality assurance). He has also participated in ENLU (European network for the promotion of language leaning among all undergraduates) and HUMART (Tuning social sciences), and was an associate member of the DYLAN project in FP6.