Add a variable text, right behind a localized label

Hello all,

my aim is actually quite simple. I want to show the following information:
“Speed: X”
while X is obviously dynamic.

Without localization I would have choosen this approach:
currentSpeed.text = "Speed: " + tmpSpeed.ToString(“0”);

But now I would like to add the localization here.
I have just installed the localization package and played around a bit.
My idea: Can I somehow use a reference to the key words I defined within the localization table?

Somehow like this:
currentSpeed.text = LocalizationKeyWord + tmpSpeed.ToString(“0”);

Or is there another meaningful approach?

Does somehow have an idea how to do it?