This article examines the notion of linguistic insecurity in the process of learning/teaching foreign languages, in particular that felt by non-native French teachers in Colombia. We will therefore focus on the possible reasons why Colombian teachers of French as a foreign language (FLE) feel this insecurity, while presenting the notion and representation that these teachers make of the native / non-native speaker, as well as of the mother tongue or first langue (LM/L1), both being very close. We will also explore the status and place of the French language in Colombia, and finally discuss the role played by the training provided in Colombian universities for future language teachers. Finally, we will make some suggestions to address this feeling of insecurity and thus improve not only the quality of the training and the work of FLE teachers, but also their lives in general.