English, French and non-official mother tongue, Lac-Saint-Jean-Est (Municipalité régionale de comté), 2011 to 2021
| Languages | Years | ||
|---|---|---|---|
| 2011 | 2016 | 2021 | |
| English only | 230 | 185 | 215 |
| French only | 51,365 | 51,520 | 51,315 |
| Single non-official language | 155 | 240 | 295 |
| Multiple mother tongues | 125 | 140 | 180 |
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