Protocol
Give each language its own evidence trail
Two languages can share a calendar without sharing one score.
When it fits
- You are learning two or more languages and overall study time is visible, but progress and interference are hard to diagnose.
When to avoid it
- Research on cross-linguistic influence does not justify a universal rule to separate or combine languages by day. Scheduling should follow goals, available time and observed interference.
Why it matters
Track real performance separately for each language: current target situations, recurring errors, active phrase set, delayed retrieval and spontaneous samples. Cross-language influence can help or interfere depending on the feature and learner, so diagnose actual transfer instead of assuming that parallel study is either always efficient or always harmful.
Steps
- A learner can say what is improving in each language without using total study minutes as the main evidence.
An example
English may be maintained through work meetings while German gets a deliberate speaking cycle; their errors and retrieval queues remain separate even if the same learning system stores both.
Check your result
A learner can say what is improving in each language without using total study minutes as the main evidence.
Keep this limit in mind
- Research on cross-linguistic influence does not justify a universal rule to separate or combine languages by day. Scheduling should follow goals, available time and observed interference.
Connected ideas
Useful withContrast languages only where interference actually appears
Evidence and sources
Cross-linguistic influence in multilingual learning can be facilitative or inhibitory, with direction and strength affected by factors such as proficiency, language status, linguistic proximity, recency and dominance.
This does not establish that simultaneous English and German study is inherently beneficial or harmful for a particular adult learner.
Cross-Linguistic Influence · Chapter summary