doc install debian: fix a typo and add missing translation (#443)

Author: komainu8

_po/ja/install/debian.po

@@ -116,15 +116,17 @@ msgid ""
 "If you want to use [`<&@*>` operator](https://pgroonga.github.io/reference/"
 "operators/semantic-distance-v2.html) or [`&@*` operator](https://pgroonga."
 "github.io/reference/operators/semantic-search-v2.html) for semantic search, "
-"you also need to install `groonga-plugin-lamguage-model` package:"
+"you also need to install `groonga-plugin-language-model` package:"
 msgstr ""
 "セマンティックサーチ用に、[`<&@*>`演算子](https://pgroonga.github.io/ja/"
 "reference/operators/semantic-distance-v2.html) または、 [`&@*`演算子]"
-"(https://pgroonga.github.io/ja/reference/operators/semantic-search-v2.html)"
+"(https://pgroonga.github.io/ja/reference/operators/semantic-search-v2.html)を"
+"使いたい場合は、`groonga-plugin-language-model`パッケージもインストールする必"
+"要があります。"
 
 msgid ""
 "```console\n"
-"$ sudo apt install -y -V groonga-plugin-lamguage-model\n"
+"$ sudo apt install -y -V groonga-plugin-language-model\n"
 "```"
 msgstr ""
 

install/debian.md

@@ -61,10 +61,10 @@ If you want to use [MeCab](http://taku910.github.io/mecab/) based tokenizer, you
 $ sudo apt install -y -V groonga-tokenizer-mecab
 ```
 
-If you want to use [`<&@*>` operator](https://pgroonga.github.io/reference/operators/semantic-distance-v2.html) or [`&@*` operator](https://pgroonga.github.io/reference/operators/semantic-search-v2.html) for semantic search, you also need to install `groonga-plugin-lamguage-model` package:
+If you want to use [`<&@*>` operator](https://pgroonga.github.io/reference/operators/semantic-distance-v2.html) or [`&@*` operator](https://pgroonga.github.io/reference/operators/semantic-search-v2.html) for semantic search, you also need to install `groonga-plugin-language-model` package:
 
 ```console
-$ sudo apt install -y -V groonga-plugin-lamguage-model
+$ sudo apt install -y -V groonga-plugin-language-model
 ```
 
 Create a database:

ja/install/debian.md

@@ -61,10 +61,10 @@ $ sudo apt install -y -V postgresql-13-pgdg-pgroonga
 $ sudo apt install -y -V groonga-tokenizer-mecab
 ```
 
-セマンティックサーチ用に、[`<&@*>`演算子](https://pgroonga.github.io/ja/reference/operators/semantic-distance-v2.html) または、 [`&@*`演算子](https://pgroonga.github.io/ja/reference/operators/semantic-search-v2.html)
+セマンティックサーチ用に、[`<&@*>`演算子](https://pgroonga.github.io/ja/reference/operators/semantic-distance-v2.html) または、 [`&@*`演算子](https://pgroonga.github.io/ja/reference/operators/semantic-search-v2.html)を使いたい場合は、`groonga-plugin-language-model`パッケージもインストールする必要があります。
 
 ```console
-$ sudo apt install -y -V groonga-plugin-lamguage-model
+$ sudo apt install -y -V groonga-plugin-language-model
 ```
 
 データベースを作成します。