Task: Multilanguage Telegram bot

n8n workflow JSON:
{"nodes":[{"name":"chatID","type":"n8n-nodes-base.function","notes":"username and language","position":[-100,680],"parameters":{"functionCode":"// Telegram uses the following language codes: https://en.wikipedia.org/wiki/IETF_language_tag\r\n\r\nvar data = $node[\"Telegram Trigger\"].json;\r\nconst botlang = [\"ru\", \"en\"]; // Update this after adding new language in the dictionary\r\n\r\n// Assign the default language if the translation is not yet ready\r\nvar curlang = botlang.includes(data.message.from.language_code) ? data.message.from.language_code : \"en\";\r\n\r\nreturn [{json: {chatID  : data.message.chat.id,\r\n                lang    : curlang\r\n}}];"},"notesInFlow":true,"typeVersion":1},{"name":"Merge","type":"n8n-nodes-base.merge","notes":"Wait for dictionary to load","position":[480,460],"parameters":{"mode":"passThrough"},"notesInFlow":true,"typeVersion":1},{"name":"Switch","type":"n8n-nodes-base.switch","notes":"check bot commands","position":[620,460],"parameters":{"rules":{"rules":[{"value2":"/start"},{"output":1,"value2":"/help"}]},"value1":"={{$node[\"Merge\"].json[\"message\"][\"text\"]}}","dataType":"string","fallbackOutput":3},"notesInFlow":true,"typeVersion":1},{"name":"IF","type":"n8n-nodes-base.if","position":[940,300],"parameters":{"conditions":{"boolean":[{"value1":"={{$json[\"empty\"]}}","value2":"={{true}}"}]}},"typeVersion":1,"alwaysOutputData":false},{"name":"msg_greet","type":"n8n-nodes-base.telegram","position":[1260,220],"parameters":{"text":"={{$evaluateExpression($node[\"botmessages\"].json[\"greeting\"][$node[\"chatID\"].json[\"lang\"]])}}","chatId":"={{$node[\"Telegram Trigger\"].json[\"message\"][\"chat\"][\"id\"]}}","additionalFields":{}},"credentials":{"telegramApi":{"id":"12","name":"n8n multilang bot"}},"notesInFlow":true,"typeVersion":1},{"name":"msg_welcomeback","type":"n8n-nodes-base.telegram","position":[1260,380],"parameters":{"text":"={{$evaluateExpression($node[\"botmessages\"].json[\"welcomeback\"][$node[\"chatID\"].json[\"lang\"]])}}","chatId":"={{$node[\"Telegram Trigger\"].json[\"message\"][\"chat\"][\"id\"]}}","additionalFields":{}},"credentials":{"telegramApi":{"id":"12","name":"n8n multilang bot"}},"notesInFlow":true,"typeVersion":1},{"name":"msg_help","type":"n8n-nodes-base.telegram","position":[1260,540],"parameters":{"text":"={{$evaluateExpression($node[\"botmessages\"].json[\"help\"][$node[\"chatID\"].json[\"lang\"]])}}","chatId":"={{$node[\"Telegram Trigger\"].json[\"message\"][\"chat\"][\"id\"]}}","additionalFields":{"parse_mode":"Markdown"}},"credentials":{"telegramApi":{"id":"12","name":"n8n multilang bot"}},"notesInFlow":true,"typeVersion":1},{"name":"msg_wrongcommand","type":"n8n-nodes-base.telegram","position":[1260,700],"parameters":{"text":"={{$evaluateExpression($node[\"botmessages\"].json[\"wrongcommand\"][$node[\"chatID\"].json[\"lang\"]])}}","chatId":"={{$node[\"Telegram Trigger\"].json[\"message\"][\"chat\"][\"id\"]}}","additionalFields":{}},"credentials":{"telegramApi":{"id":"12","name":"n8n multilang bot"}},"notesInFlow":true,"typeVersion":1},{"name":"New user?","type":"n8n-nodes-base.function","position":[780,300],"parameters":{"functionCode":"return [{json: {empty: Object.keys($node[\"CheckUser\"].json).length == 0}}];"},"typeVersion":1},{"name":"CheckUser","type":"n8n-nodes-base.nocoDb","position":[380,680],"parameters":{"table":"TG_users","options":{"where":"=(TG_account_ID,eq,{{$node[\"chatID\"].json[\"chatID\"]}})"},"operation":"getAll","projectId":"n8n_multilang_bot_wzhb"},"credentials":{"nocoDb":{"id":"13","name":"NocoDB n8n multilang bot"}},"notesInFlow":true,"typeVersion":1,"alwaysOutputData":true},{"name":"LoadDictionary","type":"n8n-nodes-base.nocoDb","position":[60,680],"parameters":{"table":"botmessages","options":{},"operation":"getAll","projectId":"n8n_multilang_bot_wzhb","returnAll":true},"credentials":{"nocoDb":{"id":"13","name":"NocoDB n8n multilang bot"}},"notesInFlow":true,"typeVersion":1,"alwaysOutputData":true},{"name":"botmessages","type":"n8n-nodes-base.function","position":[220,680],"parameters":{"functionCode":"\nlet data = {};\n\nfor (item of items) {\n  data[item.json.botmessage]=item.json;\n}\n\nreturn data;"},"typeVersion":1},{"name":"Telegram Trigger","type":"n8n-nodes-base.telegramTrigger","position":[240,460],"webhookId":"21dac5fa-6e6b-43a0-b099-4f57537d2271","parameters":{"updates":["message"],"additionalFields":{}},"credentials":{"telegramApi":{"id":"12","name":"n8n multilang bot"}},"typeVersion":1},{"name":"HTTP AddUser","type":"n8n-nodes-base.httpRequest","position":[1100,220],"parameters":{"url":"https://database.digigin.eu/api/v1/db/data/noco/n8n_multilang_bot_wzhb/TG_users","options":{"bodyContentType":"json"},"requestMethod":"POST","authentication":"headerAuth","bodyParametersUi":{"parameter":[{"name":"TG_account_ID","value":"={{$node[\"chatID\"].json[\"chatID\"]}}"},{"name":"Last_language_used","value":"={{$node[\"Telegram Trigger\"].json[\"message\"][\"from\"][\"language_code\"]}}"}]}},"credentials":{"httpHeaderAuth":{"id":"21","name":"Header Auth NocoDB"}},"typeVersion":1},{"name":"HTTP UpdateUser","type":"n8n-nodes-base.httpRequest","position":[1100,380],"parameters":{"url":"=https://database.digigin.eu/api/v1/db/data/noco/n8n_multilang_bot_wzhb/TG_users/{{$node[\"CheckUser\"].json[\"id\"]}}","options":{"bodyContentType":"json"},"requestMethod":"PATCH","authentication":"headerAuth","bodyParametersUi":{"parameter":[{"name":"TG_account_ID","value":"={{$node[\"chatID\"].json[\"chatID\"]}}"},{"name":"Last_language_used","value":"={{$node[\"Telegram Trigger\"].json[\"message\"][\"from\"][\"language_code\"]}}"}]}},"credentials":{"httpHeaderAuth":{"id":"21","name":"Header Auth NocoDB"}},"typeVersion":1},{"name":"AddUser","type":"n8n-nodes-base.nocoDb","disabled":true,"position":[1460,220],"parameters":{"table":"TG_users","fieldsUi":{"fieldValues":[{"fieldName":"TG_account_ID","fieldValue":"={{$node[\"chatID\"].json[\"chatID\"]}}"},{"fieldName":"Last_language_used","fieldValue":"={{$node[\"Telegram Trigger\"].json[\"message\"][\"from\"][\"language_code\"]}}"}]},"operation":"create","projectId":"n8n_multilang_bot_wzhb"},"credentials":{"nocoDb":{"id":"13","name":"NocoDB n8n multilang bot"}},"notesInFlow":true,"typeVersion":1},{"name":"UpdateUser","type":"n8n-nodes-base.nocoDb","disabled":true,"position":[1460,380],"parameters":{"id":"={{$node[\"CheckUser\"].json[\"id\"]}}","table":"TG_users","fieldsUi":{"fieldValues":[{"fieldName":"TG_account_ID","fieldValue":"={{$node[\"chatID\"].json[\"chatID\"]}}"},{"fieldName":"Last_language_used","fieldValue":"={{$node[\"Telegram Trigger\"].json[\"message\"][\"from\"][\"language_code\"]}}"}]},"operation":"update","projectId":"n8n_multilang_bot_wzhb"},"credentials":{"nocoDb":{"id":"13","name":"NocoDB n8n multilang bot"}},"notesInFlow":true,"typeVersion":1},{"name":"Note","type":"n8n-nodes-base.stickyNote","position":[1440,80],"parameters":{"width":440,"height":460,"content":"## What's this?\nDue to some breaking API changes in NocoDB some of its node options are not working at the moment (MAY 2022). These two nodes were replaced by HTTP request nodes. Functionality is still the same."},"typeVersion":1}],"connections":{"IF":{"main":[[{"node":"HTTP AddUser","type":"main","index":0}],[{"node":"HTTP UpdateUser","type":"main","index":0}]]},"Merge":{"main":[[{"node":"Switch","type":"main","index":0}]]},"Switch":{"main":[[{"node":"New user?","type":"main","index":0}],[{"node":"msg_help","type":"main","index":0}],null,[{"node":"msg_wrongcommand","type":"main","index":0}]]},"chatID":{"main":[[{"node":"LoadDictionary","type":"main","index":0}]]},"CheckUser":{"main":[[{"node":"Merge","type":"main","index":1}]]},"New user?":{"main":[[{"node":"IF","type":"main","index":0}]]},"botmessages":{"main":[[{"node":"CheckUser","type":"main","index":0}]]},"HTTP AddUser":{"main":[[{"node":"msg_greet","type":"main","index":0}]]},"LoadDictionary":{"main":[[{"node":"botmessages","type":"main","index":0}]]},"HTTP UpdateUser":{"main":[[{"node":"msg_welcomeback","type":"main","index":0}]]},"Telegram Trigger":{"main":[[{"node":"chatID","type":"main","index":0},{"node":"Merge","type":"main","index":0}]]}}}