Fill in descriptions for import options in the class reference

doc/classes/ResourceImporterCSVTranslation.xml

@@ -1,15 +1,28 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="ResourceImporterCSVTranslation" inherits="ResourceImporter" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
 	<brief_description>
+		Imports comma-separated values
 	</brief_description>
 	<description>
+		Comma-separated values are a plain text table storage format. The format's simplicity makes it easy to edit in any text editor or spreadsheet software. This makes it a common choice for game localization.
+		[b]Example CSV file:[/b]
+		[codeblock]
+		keys,en,es,ja
+		GREET,"Hello, friend!","Hola, amigo!",こんにちは
+		ASK,How are you?,Cómo está?,元気ですか
+		BYE,Goodbye,Adiós,さようなら
+		QUOTE,"""Hello"" said the man.","""Hola"" dijo el hombre.",「こんにちは」男は言いました
+		[/codeblock]
 	</description>
 	<tutorials>
+		<link title="Importing translations">https://docs.godotengine.org/en/latest/tutorials/assets_pipeline/importing_translations.html</link>
 	</tutorials>
 	<members>
 		<member name="compress" type="bool" setter="" getter="" default="true">
+			If [code]true[/code], creates an [OptimizedTranslation] instead of a [Translation]. This makes the resulting file smaller at the cost of a small CPU overhead.
 		</member>
 		<member name="delimiter" type="int" setter="" getter="" default="0">
+			The delimiter to use in the CSV file. The default value matches the common CSV convention. Tab-separated values are sometimes called TSV files.
 		</member>
 	</members>
 </class>