German is among the harder major European languages for English-speaking children to acquire to functional fluency. With the right exposure structure and the right timing, most expat children reach working German within 18 to 30 months. With the wrong structure, they reach basic conversational German and plateau.
The age question
Children under 8 acquire German fastest and most naturally, particularly through immersion in German state schools or strong bilingual programmes. Children 8 to 12 acquire German with effort but with full functional outcomes possible within 2 years. Children 13+ acquire German slowly; expect 3+ years to reach genuine fluency.
In-school provision
German international schools offer German as a subject at varying depths. Strong programmes deliver functional conversational German by Year 6. Weaker programmes deliver phrasebook German. Verify the depth before committing.
Bilingual school routes
Bilingual schools that genuinely teach half the curriculum in German deliver real fluency. See German international vs bilingual.
State school immersion
The fastest route for younger children. Germany's state schools are free and high-quality. EAL support is variable by school. For children under 10, 12 to 18 months of state school immersion typically produces working German.
Out-of-school options
Group classes at the Volkshochschule (community adult education centres) cost EUR 200 to 500 per term. Private tutoring runs EUR 30 to 60 per hour. Goethe-Institut youth programmes are well-structured but more expensive.
What works
Immersion plus daily life exposure plus structured learning. Pick two of three; pick all three for the strongest outcomes. The single biggest predictor is whether the child wants to speak German.