In Arabic Airports usually you will have all the signs/signages in both Arabic&English or French ....
but....if you need to learn Arabic, more in depth you certainly need to learn the following high-level sentences:
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1- How many pieces of luggage can I take with me?
كَمْ حَقِيبَةً يُمْكِنُنِي أَنْ آخُذَهَا مَعِي ؟
kam haqeebatan yomkenouny an akhozaha
ma'ei?
The answer might be :
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You can take two peices per individual.
يُمْكِنُكَ أَنْ تَأْخُذَ قِطْعَتَيْنِ لِكُلِ فَرْد.
Yomkinoka an ta'khoza qet'atayni lekolli fard.
2- How long is the visa valid ?
مَا هِيَ مُدَّةُ صَلاَحِيَةِ التَّأْشِيِرَة ؟
ma heya moddato salaheyati etta'asheerah?
The answer might be:
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The visa is valid for three months
التَأْشِيرَةُ صَالِحَةٌ لِثَلاَثَةِ أَشْهُر.
atta'sheeratou salehaton le thalathati ashhour.
3- How long is the flight?
كَمْ طُولَ الرِّحْلَة ؟
kam tola-rrehlah?
The answer might be:
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The flight takes two hours.
الرِّحْلَةُ سَاعَتَان.
arrehlatou sa'atan.
4- When do I have to be at the gate?
مَتَى يَجِبُ أَنْ أَكُونَ عِنْدَ البَوَّابَة ؟
mata yajebo an akouna inda-lbawabah?
The answer might be:
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In thirty minutes
فِي خِلَالِ ثَلاَثِينَ دَقِيقَة
fi khilali thalathina daqeeqah.
5- I would like to have a window seat, please.
أَرْغَبُ فِي مَقْعَدٍ بِجَانِبِ الشُبَّاك ، مِنْ فَضْلِك.
arghabo fi maq'adin bijanebi-lshoubbak, min
fadlek.