docs: add documentation for creating a language from custom template

docs/new_language.md

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+# Setting up a new language
+
+## Main things
+The main two things you will want when setting up a new language without a template are dictionaries, and a stanza model if you are using [Stanza](stanza.md).
+
+The stanza model can be set in the [grammar settings](grammar.md), following the directions there.
+Dictionaries can be added in the [dictionary settings](dictionaries.md)
+If your target language has a word reference dictionary, you will likely want to add that. 
+Your target language will likely have a Wiktionary dictionary, which you also may want to add.
+You may also want to add a custom embedded url as a dictionary, which also an option (see the dictionary settings for more).
+
+If there is a dictionary that you think should get more support with custom coloring and integration with Kalba, you can create an issue on github.
+
+## Other quality of life benefits you could set up
+If you have a frequency list, adding that to the grammar settings will allow you to automatically mark the N most common words of a language as known.
+Additionally, if you have some programming knowledge, you may want to try [adding a custom spyglys parser](spyglys_parser.md).