Ahhh Meister Yoda…
You have discovered the wonderful and accurate description called a “Shitstorm” 
I researched world population figures and Germany is around 1.11% of the worlds population. And whilst German is the native tongue of 229M (inclusive of Austria, Belgium, Germany, Italy (South Tyrol), Liechtenstein, Luxembourg, Poland, Switzerland), you’ll find that over twice as many speak English of a sort (510M - Antigua and Barbuda, Australia, The Bahamas, Bangladesh, Barbados, Belize, Botswana, Brunei, Cameroon, Canada, Dominica, Ethiopia, Eritrea, Fiji, The Gambia, Ghana, Grenada, Guyana, Hong Kong (People’s Republic of China), India, Ireland, Jamaica, Kenya, Kiribati, Lesotho, Liberia, Malawi, Maldives, Malta, Marshall Islands, Maritius, Micronesia, Namibia, Nauru, New Zealand, Nigeria, Pakistan, Palau, Papua New Guinea, Philippines, Rwanda, Saint Kitts and Nevs, Saint Lucia, Saint Vincent and the Grenadines, Samoa, Seychelles, Sierra Leone, Singapore, Solomon Islands, Somolia, South Africa, Sri Lanka, Swaziland, Tanzania, Tonga, Trinidad and Tobago, Tuvalu, Uganda, United Kingdom, United States, Vanuatu, Zambia, Zimbabwe.) Data source: Ethnologue: Languages of the World, 15th ed. (2005) & Wikipedia.org.
I suppose my point is that there are way more people who use English as their main language than German and commercially speaking, It may be worthwhile having the debate about adding Miss and Ms. at least.
So many women in AU get a bee in their bonnet about having to identify as either Miss or Mrs and prefer the marital anonymity of Ms. That said the ‘normal’ women who are not yet married should not be exempt from a title and should not be forced to use Mrs when they are not yet married.
I agree that adding academic titles may not be necessary but [U][B]IF[/B][/U] a rework of the templates is required for Miss and Ms. then why not go the whole hog and add the academic titles in. It can only enhance the software’s commercial marketability.
When I added States and Territories to my en_US version, I did so via phpMyAdmin. Perhaps the salutations could be added in here instead of via tpl-files?
I am not clever at coding and can barely keep my nose above water with much of the conversations on code but I do know marketing and consumer reactions. In sales we try to minimise the negatives and maximise the positives. Not having Miss in the first instance and Ms. in the second is a negative for a lot of women.
Just saying…