🌐 deepl.nvim

A Neovim plugin that translates text using the DeepL API with multiple output modes (float, replace, append).

✨ Features

• Translate text selected in visual mode using the DeepL API
• Multiple output modes:
  • Float mode: Display translation results in a floating window
  • Replace mode: Replace selected text with translation
  • Append mode: Append translation below selected text
• User-specified target language
• Simple and lightweight implementation

📋 Requirements

• Neovim 0.7.0 or higher
• DeepL API key (free or paid plan)
• curl command

📦 Installation

lazy.nvim

{
  "walkersumida/deepl.nvim",
  version = "*",
  opts = {},
}

packer.nvim

use {
  "walkersumida/deepl.nvim",
  config = function()
    require('deepl').setup()
  end,
}

vim-plug

Plug "walkersumida/deepl.nvim"

⚙️ Configuration

DeepL API Key

Set your DeepL API key in the DEEPL_API_KEY environment variable.

export DEEPL_API_KEY="your-api-key-here"

You can make this persistent by adding it to your shell configuration file (.bashrc, .zshrc, etc.).

Plugin Initialization

Add the following to your init.lua or init.vim:

require('deepl').setup()

Currently, there are no configuration options, but they may be added in the future.

🚀 Usage

Basic Usage

1. Select text in visual mode
2. Run the :DeepL <language_code> [--mode=<mode>] command

Output Modes

The plugin supports three output modes:

• float (default): Display translation in a floating window
• replace: Replace selected text with translation
• append: Append translation below selected text (with an empty line)

Examples

" Display translation in floating window (default)
:DeepL EN
:DeepL EN --mode=float

" Replace selected text with translation
:DeepL JA --mode=replace

" Append translation below selected text
:DeepL DE --mode=append

Supported Languages

Examples of language codes:

• EN - English
• JA - Japanese
• DE - German
• FR - French
• ES - Spanish
• IT - Italian
• NL - Dutch
• PL - Polish
• PT - Portuguese
• RU - Russian
• ZH - Chinese
• KO - Korean

For a complete list of supported languages, see the DeepL API documentation.

⌨️ Keybinding Examples

Example keybindings for convenience:

-- Translate to English (floating window)
vim.keymap.set('v', '<leader>te', ':DeepL EN<CR>', { desc = 'Translate to English' })

-- Translate to Japanese (floating window)
vim.keymap.set('v', '<leader>tj', ':DeepL JA<CR>', { desc = 'Translate to Japanese' })

-- Replace with English translation
vim.keymap.set('v', '<leader>tre', ':DeepL EN --mode=replace<CR>', { desc = 'Replace with English translation' })

-- Replace with Japanese translation
vim.keymap.set('v', '<leader>trj', ':DeepL JA --mode=replace<CR>', { desc = 'Replace with Japanese translation' })

-- Append English translation below
vim.keymap.set('v', '<leader>tae', ':DeepL EN --mode=append<CR>', { desc = 'Append English translation below' })

-- Append Japanese translation below
vim.keymap.set('v', '<leader>taj', ':DeepL JA --mode=append<CR>', { desc = 'Append Japanese translation below' })

🎮 Floating Window Controls

When the translation result floating window is displayed:

• Press q or ESC to close

🔧 Troubleshooting

API Key Error

DEEPL_API_KEY environment variable is not set

→ Check that the DEEPL_API_KEY environment variable is set.

curl Error

curl error: ...

→ Check that the curl command is installed.

JSON Parse Error

The DeepL API response may be incorrect. Check that your API key is valid.

📚 References

• DeepL API Documentation

⭐ Show your support

Give a ⭐️ if this project helped you! Thank you!