adjust the thread tables differences in CED/OSM -Machining between english and german

Please specify which version of the program you are using.

On my opinion, according to your screenshots, both German and English are not precise enough because two designations are missing, R and Rc.

ISO 228: Pipe threads where pressure-tight joints are not made on the threads

Example: G 1/2 for internal and external thread.

EN 10226-1: Pipe threads where pressure tight joints are made on the threads - Part 1 : taper external threads and parallel internal threads

Examples:

Taper external thread R 1/2

Parallel internal thread Rp 1/2

EN 10226-2: Pipe threads where pressure tight joints are made on the threads - Part 2 : taper external threads and taper internal threads

Examples:

Taper external thread R 1/2

Taper internal thread Rc 1/2

You are right that it is not clear.

I recommend you to post an idea on https://community.ptc.com/t5/Creo-Elements-Direct-Ideas/idb-p/creoelementsdirectideas

To avoid any confusion, the name in the tables (German, or English, or other) should be :

G  (ISO228-1)

R  (EN 10226-1)

Rp  (EN 10226-1)

Rc  (EN 10226-1)

Not recommended to put the national prefix DIN, BS, NF, ... Based on my own experience, this is confusing for non European Union users.