Strings for "Rectangular Grid" and "Axonometric Grid" are not translated in the UI (document properties)

Summary:

In the Grids tab of the Document Properties dialog, there is a dropdown selector with two options: "Rectangular Grid" and "Axonometric Grid". When using Inkscape in a language other than English, these strings are not translated, even though they are translated and available in the po file.

Steps to reproduce:

• Open Inkscape in Spanish (Settings... > Interface > Language:)
• Open the Document Properties dialog (File > Document Properties...)
• Open the Grids tab
• See the dropdown selector with the option "Rectangular Grid" selected

What happened?

The options in the dropdown are not in Spanish. They are shown in English (see attached screenshot).

What should have happened?

The two options should be shown in Spanish.

Sample attachments:

Version info

Inkscape 1.3-beta (cedbd6c, 2023-05-28)

    GLib version:     2.72.1
    GTK version:      3.24.37
    glibmm version:   2.60.0
    gtkmm version:    3.24.5
    libxml2 version:  2.10.3
    libxslt version:  1.1.35
    Cairo version:    1.17.9
    Pango version:    1.50.6
    HarfBuzz version: 2.9.1

    OS version:       macOS 13.4 (22F66) x86_64