What is the ruling on wearing clothes that have a brand name whose meaning is unknown, and is it obligatory to investigate its meaning?

We explained in Fatwa 129091 the permissibility of wearing items bearing foreign logos of brands and the like, as long as they do not include a disbelieving symbol or a forbidden matter. It appears that there is no obligation to investigate the meaning of the brand, and it is sufficient to rely on the default principle – permissibility – unless the contrary is definitively proven. Investigating is preferable and more cautious, and it is not difficult.