FIX #9511 Change lang variable

.angulardoc.json

MaarchCourrier

cs_maarch_develop

...emplate-administration-checkEntities-modal.component.html

...istration/template/template-administration.component.html

src/frontend/lang/lang-en.ts

src/frontend/lang/lang-fr.ts

src/frontend/lang/lang-nl.ts

test/unitTests/app/template/TemplateControllerTest.php