Craig Bellamy's Wales are to face Romania in a friendly in Bucharest in June after both missed out on World Cup qualification.
The helmet and three golden bracelets were stolen in January 2025, but one bracelet is yet to be found.
It would help thousands of Romanians living in Sheffield to meet for events, according to those behind the plan.
Romanian is the most widely spoken foreign first language in London with 159,000 speakers.
George Smyth, from Newport, Shropshire, has been missing in the Bucegi Mountains since 23 November.
The rapper, who has been sentenced in absentia, had admitted to smoking a cannabis joint on stage at a festival last year.
Mountain rescuers "make a renewed effort" to find George Smyth amid fresh snowfall.
Mountain rescue teams say they will start searching again tomorrow, weather permitting.
The gang carried out raids at 51 UK locations, withdrawing cash in 3,300 transactions, court hears.
