Created Change Language (markdown)

Change-Language.md

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+## Change language for all users
+
+Using MongoDB Shell with WeKan Snap Candidate, to change English date format to `DD/MM/YY`.
+
+MongoDB Shell Download: https://www.mongodb.com/try/download/shell
+
+language.sh:
+```
+mongosh --quiet \
+--host 127.0.0.1 \
+--port 27019 \
+--eval 'use wekan' \
+--eval 'db.users.updateMany({}, { $set: {"profile.language": "en-GB" }});'
+```
+Set script as executeable:
+```
+chmod +x language.sh
+```
+Running script:
+```
+$ ./language.sh 
+{
+  acknowledged: true,
+  insertedId: null,
+  matchedCount: 20,
+  modifiedCount: 0,
+  upsertedCount: 0
+}
+```