UPDATE: EA Help has confirmed that the following countries will have new prices for The Sims 4 Packs:

Brazil

Canada

Denmark

Italy

Korea

Mexico

Norway

Poland

Spain

Sweden

South Africa

United Kingdom

They also provided a very brief explanation on why did this price update happen:

When foreign exchange rates, currency values, and regional markets change, we have to update our prices. We were able to keep prices the same for years, but these changes are causing updates.

Electronic Arts has decided to update its Origin service with new, more expensive prices for The Sims 4’s Stuff Packs, Game Packs and Expansion Packs.

Right now we have information that multiple countries have suffered these price changes. Here are the updated pack prices in some of the countries mentioned:

Brazil

Stuff Packs: R$ 19.90 > R$ 39.90

R$ 19.90 > R$ 39.90 Game Packs: R$ 39.90 > R$79.90

R$ 39.90 > R$79.90 Expansion Packs: R$ 79.90 > R$ 129.90

Poland

Stuff Packs: 39.90 PLN > 49.90 PLN

39.90 PLN > 49.90 PLN Game Packs: 59.90 PLN > 69.90 PLN

59.90 PLN > 69.90 PLN Expansion Packs: 119.90 PLN > 139.90 PLN

Canada

Stuff Packs: 9.99$ > 12.99$

Game Packs: 19.99$ > 25.99$

Expansion Packs: 39.99$ > 51.99$

United Kingdom

Stuff Packs: 7.99£ > 9.99£

Back in June 2017 EA has confirmed to us on why do these price changes occasionally happen – back when they updated the prices for Expansion and Game Packs in the UK:

Periodically, we update prices on our games due to currency fluctuations and regional market changes. With the significant decline of the British Pound Sterling against other currencies including the U.S. Dollar and The Euro, as well as other market factors, we are increasing our UK wholesale pricing for EA console and PC titles this year, which will in turn increase our UK Recommended Retail prices.

Let’s take the Brazilian Dollar as an example: Game Packs used to cost around 12 USD in Brazil. Now, they cost 24 USD in Brazil.

Via Google

This price change has probably been applied to other EA games as well.

We yet have to see how much will this influence retail stores in these countries…

We’ll keep updating you on this story as it develops!

Thanks to DotSim, @WinterAutora and MelissaStarbees for additional info!