@deome's Portal : Feature German translation

I would like to contribute a German translation for your addon, since I like it (and I want to use it with my game copy which is in German).

I commented on your addon as well and this is a copy of the text:

How can I do this? Can I simply translate your EN.lua in the i18n folder to German and upload it or email it to you? Can I insert German umlauts (Umlaute) and the sharp S (so ü, ö, ä, ß) as well or does they need to be inserted like in HTML for example?
How I can test my own translations? Once I put in a DE.lua in that folder will the game automatically load the German translations while the client language is German?

Particular questions:
1.When does your addon display the variable "ZO_CreateStringId("DD_ONLOAD", "Summoned and bound.")" ?
2. What is "ZO_CreateStringId("DD_TASKMASTER_EASY_BUTTON_NAME", "EASY")" and should it be translated?
3. What is "cFFD700" in "ZO_CreateStringId("DD_TOOLTIP_CRAFTING_WAVG", "|cFFD700<<1>>|r <<2>>")"? A colour code, I guess?

Please note, I do not have any LUA skills nor know any other programming language (just HTML and CSS, but I guess that is not helping here ;)).