Language & WorldFact
Spaniards say 'God willing' every day – in Arabic.
Spanish 'ojalá' (hopefully) is a worn-down form of Arabic 'law šāʾ Allāh' or 'in šāʾ Allāh': 'if God wills'. It became so embedded in Spanish that it now requires the subjunctive: 'Ojalá que llueva'. A medieval religious wish turned into a neutral everyday word.
Useful: After 'ojalá' always use the subjunctive, never the indicative.
Source: en.wiktionary.org