Method, device, computer program and computer readable storage medium for determining a command

A method for operating a device based on a command, the method comprising:

• providing a set of pseudo words, wherein each pseudo word of the set of pseudo words is representative of and is a phonetic approximation of more than one known real word of a set of real words, which is provided for a pronunciation model, each of the pseudo words thereby being configured to sound like several real words of the set of real words without being any real word,
• mapping an acoustic signal to phonemes by an acoustic model,
• determining at least one output word dependent on the phonemes and the pronunciation model,
• determining the command based on the at least one output word, the set of pseudo words and a set of command words,
• discarding the command by causing the device to not perform an action associated with the command based on a determination that the command comprises a pseudo word of the set of pseudo words, and
• causing the device to perform the action associated with the command based on a determination that the command is not discarded and does not include a pseudo word.