OPT: register_multimodal: added flag to initialize translation (issue #735)
OPT: register_multimodal: added flag to initialize translation (issue #735)

Former-commit-id: 0f5d58e19ebc8d58deb0c20a168cbcac9bbacc29
Former-commit-id: dedf7195d61461684909221da95bee4f0a2817f8
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox