Fix typo

sections/usage.md

@@ -4,6 +4,6 @@
 
 - The model predicts the answers from a list of 3129 answers which have their labels present in `answer_reverse_mapping.json`.
 
-- Lastly, once can choose the `Answer Language` which also uses a saved dictionary created using `mtranslate` library for the 3129 answer options.
+- Lastly, one can choose the `Answer Language` which also uses a saved dictionary created using `mtranslate` library for the 3129 answer options.
 
 - The top-5 predictions are displayed below and their respective confidence scores are shown in form of a bar plot.