Please help on an Islamic sword

[Hrthuma ibn Marwan]

Fernando, like S.Al-Anizi said, you should position the dagger with the tip of the blade facing upwards, and the hilt facing south.

But also as you said:

I have learnt that some times these inscriptions are made with a strong decoration style, by blade smiths who are not fluent in Arabic, or even non Arab speacking. They do the letters by copying them from another piece, or from a written text.

That makes reading alot harder heh.

Good luck