SmarterQR
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lang.primary

The phone says the language, not the print run

One badge, international, three languages. The phone asks for German, French or something else — the print is the same in every country. An unknown language falls to the mandatory rule, here English.

Where it hangs
Badge, menu in a tourist town, package insert, object label.
Why the paper stays
Four printed stacks, and the English one is always the one that runs out.

Live resolution

lang.primary = de
geo.country = DEdevice.os = androidscan.count_total = 96
  1. 1German
  2. 2French
  3. alwaysOtherwise
https://summit.io/de/programm

Language the phone asks for

An event badge on a lanyard, carrying the code
The same code on every shot.Badge, menu in a tourist town, package insert, object label.

The ruleset

Valid, storable, mandatory rule last.

Not a description of what the engine could do — this is the text a code carries. The first matching rule wins, and the last one always matches.

ruleset · version 1

{
  "rules": [
    {
      "when": { "lang.primary": { "eq": "de" } },
      "then": { "type": "redirect", "url": "https://summit.io/de/programm" }
    },
    {
      "when": { "lang.primary": { "eq": "fr" } },
      "then": { "type": "redirect", "url": "https://summit.io/fr/programme" }
    },
    {
      "when": "always",
      "then": { "type": "redirect", "url": "https://summit.io/schedule" }
    }
  ]
}

Also

Same axis, different situation.

Menu
DE/FR/IT/EN off one card. The tourist town does not reprint per season.
Instructions
A PDF per language, otherwise the short HTML version.
Object label
The text at the exhibit, in the language the visitor brought.

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Reprinting is the expensive part. Stop doing it.

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