With this plugin, you can first intialize a Praat picture for a F1/F2 vowelchart (option: show german standard vowelchart). You can then add measured formant values with the appropriate symbols to the chart (options: symbol, color, circle around symbol). Here’s an example with the German standard vowelspace for male speakers in blue and some measured vowels in red:
The following resources are provided free and without warranty. Some are GPLed, most of them come unlicenced.
Almost all Praat plugins and scripts listed here are based on the current Praat scripting syntax. To run them you need a current version of Praat (version 5.3.64 or newer).