The Vale of Glamorgan will get its first Welsh language immersion centre for later learners.
Eight local authority areas will get extra funding to launch late immersion provision as part of a Wales-wide rollout.
The Welsh Government says the money will be used to establish new resources, where there's previously been none, or to expand provision where there's growing demand.
Ministers have previously set targets to boost the number of active Welsh speakers to a million by 2050.
Around £2.2 million of extra investment was announced in September.
Welsh language minister Jeremy Miles said: ''The Welsh language belongs to us all, and I’m committed to providing the support needed to achieve the goals in our ‘Cymraeg 2050’ strategy and to help more of us to learn and use our language.''
''The applications we received from local authorities across Wales for late immersion support showed true enthusiasm for expanding this programme.''
''I’m delighted to see that there is a real commitment right across the country to support our learners to enter Welsh medium education, even if that is at a later entry point, and help them to develop bilingual skills for life.''
The other areas to benefit from the new provision are Blaenau Gwent, Bridgend, Caerphilly, Torfaen, Merthyr Tydfil, Neath Port Talbot and Powys.
All parts of Wales will receive funding, which includes expanding existing late immersion programmes and some additional support for Welsh language schools as a result of COVID.
A Welsh Government spokesperson added: ''Late immersion provision helps learners entering Welsh-medium education at a later stage - typically after the age of seven - and pupils for whom Welsh may not have been part of their daily routine, to gain the skills and confidence needed to continue their learning through Welsh.''
''This investment will also support learners who may have missed out on vital learning time or lost some of their language capability during the pandemic.''
Ministers are also working with local authorities to create a nationwide network aimed at sharing information and best practice on delivering late immersion provision.